Do I need planning permission for an ASHP?

Good news! The government has made it easier to install heat pumps by relaxing the rules—most installations now fall under permitted development.

Here are the key points:

• You can now place your heat pump as close to your property boundary as you like.
• If your heat pump is mounted above ground level, it must not be visible from the road frontage.
• If you have a detached home and need multiple heat pumps (a cascade system), you’re allowed to install them as long as the total unit size stays under 1.5m³. If it’s larger, you’ll need to submit a planning application. In most cases, this covers two twin-fan units.

A few important things to keep in mind:

• You’ll still need to pass a sound assessment.
• Manufacturer and refrigerant clearances still apply
• Permitted development doesn’t apply to conservation areas or certain listed buildings, so it’s always best to check with your local planning authority to confirm the rules for your property.

Important

If your installation requires planning permission, it’s your responsibility as the homeowner to apply for it—not your installer’s. If permission isn’t secured when needed, your local planning department could ask you to relocate or even remove the unit.

Of course, as your installer, we’re here to guide and support you as much as possible.